Water heater



H. HARGREAVES.

WATER HEATER. APPLICATION FILED 1uLY29, 1920.

1 ,41 5 ,343, Patented May 9, 1922. I 4 SHEETS-SHEET 1.

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WATER HEATER.

APPLICATION FILED JULY29, 1920.

Patented May 9, 1922.

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. WATER HEATER. APPLICATON FILED JULY 29, 1920- 1,415,343, Patented May 9, 1922.

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WATER HEATER.

APPLICATION FILED JULY 29, 1920.

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WATER HEATER.

Specification of Letters Patent.

Patented May 9, 1-922.

Application filed. July 29, 1920. Serial No. 399,658.

To all to 710m it may concern.

Be it known that I, HAROLD HAnonn-Avns, a subject of the King'of Great Britain and Ireland, residing at 4-5 Hollingreave Road, Burnley, in the county of Lancaster, England, have invented new and useful Improvements in Water Heaters, of which the following is a specification.

This invention relates to a water heater for use in cafes, restaurants, or other places where a plentiful and more or less continuous supply of boiling water is a desideratum.

My improved water heater possesses the following advantages, following upon the construction hereafter fully described.

Only boiling water or water which has been boiled can be drawn oft, whilst owing to the small quantity of water present at any one time in the boiling chamber a supply of boiling water is quickly obtainable. The boiling water is contained in a metal chamber which is thoroughly enclosed and as it were jacketed. Automatic regulation of the flow of water according to the speed of boiling is obtained, as well as automatic regulation of the gas whereby the gas supply is under perfect control even in the event of a failure of water supply. The construction permits ready access to or removal of the casings or vessels in which the water is boiled. A further feature is the isolation or insulation of the water valve box.

The drawings illustrate a construction of water heater embodying the features of my invention.

In the said drawings:

Fig. 1 is a front elevation of the water heater.

Fig.

Fig. its seat.

Fig. 3 shows a side elevation partly in section.

Fig. 4 is a plan view.

Figs. 5 and 6 are separate detail front view and sectional view of the gas valve casing, gas valve, etc.

In the first three figures, the vertical length of the heater is purposely shortened for lack of room on the sheets.

In the construction illustrated by the drawings, I use a gas ring or burner 06 supplied with gas and controlled in manner such as is hereafter described and the gas flame imparts heat to a cylindrical casing or vessel 6.

2 shows a vertical section. 2 is a detail of the water valve and -guide aperture 611 Inside the casing or vessel 6 is fitted a second cylindrical casing c in such manner as to leave an annular intermediate space marked 0*, and this second cylindrical casing is fashioned with a float chamber (Z, a more or less upright connecting pipe 6, and an over-flow or pufi' pipe 7". Water occupies a", d, e, and f .to a suflicient extent. As soon as the boiling point is reached, steam pressure collecting in the float chamber (Z and the upper part of 0* forces the boiling water upwards through the over-flow or puff pipe 7, such boiling water falling into and collecting in the central hot water chamber g from which chamber the same'can be supplied through the draw-oft tap 9. When boiling water'is forced out at flwater is withdrawn from the float chamber (Z from 0* and so the float cl supported in said float chamber 45 falls. Said float d has a rod 03 attached thereto the same working through a metal washer (Z applied to the cover (i of the float chamber and through a A loose metal collar (Z fitting on'the rod d and resting against the washer (i may be used to prevent the escape of steam between the rod d and washer Thereference letter d denotes a very small air or vent hole in the cover of the float chamber 45 to allow the water in 0*, (Le and f to assume its normal level when such water is not boiling. This hole is small enough to allow only a negligible quantity of steam to pass when the water is boiling, 0*, (Z, and 6 being thus for all practical purposes closed at the top to retain steam pressure.

To the float rod 03 I attach links 6Z (Z pivoted upon a pin or stud al, the other extremities of the links being jointed at the points al (W to the lever h. This lever has a T piece it" attached to it, by screws or otherwise, such T piece having a spindle h? :tashioned along with it and working through a gland 71. The spindle la? finds a bearing in the oppositeside of the water valve box It and has a cam it fixed the'reon'which cam .actuates a valve h to force such valve to or remove same from its seat It in similar manner to a ball valve or like water valve arrangement. The water valve box it is secured by screws 72. to a plate 71. soldered on the outer casing, small non-conducting washers being interposed to prevent heat passing. In order to remove the valve washer in the water valve box h the box cover can be lifted away by removing the screws 71.".

Should the float (Z fall, feed water is admitted into the valve box it because the valve 77/ is moved from its seat, the water passing down the tube it and through the bend it to the space between the two cylindrical sleeves z, j which form a double outer casing surrounding the heater. The object of the bend it is to prevent hot water rising from the outer casing into the valve box h. The outer casing, as shown, is built-up from two cylindrical sleeves i, j so as to produce a water space between same, the two elements being soldered or otherwise secured together at'the point 2'. Such two cylindrical sleeves i, j are also soldered to the lower face of the metal flange 2' Holes i are drilled in said flange 2' to establish communication from the water in the outer casing j*, and channels i are formed in the upper face of the flange i so that water can flow through the holes i across the channels 2' and into the water space 0* between the vessels 6, c. This is clearly shown particularly in Figs. 2

and 4.

The vessel 6 is soldered to the inside edge of the lower flange 2' whilst the vessel 0 is soldered or secured to the inside edge of the upper flange i. The two flanges i i are faced and connected together by the screws 2'. Slots 1? are cut through both flanges 2' i to allow waste gases to escape.

In connection with the water space 0 between the vessels Z), and 0, is a pipe Z0 leading to the cylindrical casing which is shown in section in Fig. 3, and such casing contains two floats 7a, 70 Fixed to float 7c is a float spindle 70 which is guided by an aperture in the dished plate 70 and, by an aperture 7135 in the bottom of the cylindrical casing 70.

When the water level in the cylindrical casing is is' normal, the float 7c presses itself against the dished plate 70*. Resting on and pressing against the float spindle 70 is a circular plate k which is carried by the links 70 pivoted at the point'lc to the lever Z. The floatZ: has a tube is running axially through it, allowing the float spindle 70 to work therethrough and independent of the second float Z0 a When the level of the waterin the hot water container 9 rises above the discharge or puff pipe f, the second float 70 rises too. To the top of such second float 70 is fixed a dished ring or actuator 70 of a design to cooperate with circular plate 70 and so to keep the latter in a central or mid-position Respecting the gas valve casing Z, the lever Z is fixed to the spindle Z and works through a gland Z formed on the gas valve casing Z. Such gas valve casing is made in two parts secured together by screws (see Figs. 3, 5 and 6). v The spindle Z carries two sheet metal segments Z Z between which is clamped a sheet of paper Z or other suitable material.

' the clamping being effected by the action of screws. The paper is cut to the contour shown in Fig. 5.

Upon the gas valve casing Z is formed a union connection Z for the gas inlet pipe, whilst an elbow attachment is screwed on at Z for attaching the pi e Z which feeds the gas to theburner a uniler control of .the ordinary taps. If Fig. 6 be examined, it will be noticed that just suflicient space is left between the meeting faces of the gas valve casing Z for the paper Z to move freely. Gas passage ways are drilled through the flat meeting face of the gas Valve casing Z and a similar hole Z "is cut inv the paper Z and, when these holes coincide, the gas is full on and flows through the full passage ways.

A narrow slot Z cut in the paper Z leads from the aperture Z and is for the purpose of regulating the gas to just the quantity required to keep the heater at boiling point when full of water. A smallhole Z is also cut in the paper to allowasmall quantity. of gas to pass for a pilot light when the gas is shut down owing to failure of water supply. I

When the water level between the cylindrical casings 6 0 is normal, the 'full gas aperture Z occupies a position to put the gas full on, but, should the water level fall below the pipe connection 70, the water from the float casing 70 runs out, and so the float Z 3 falls. This action removes the float spindles 76 from below the circular plate 70 which then falls, and pulls down the lever Z moving the aperture Z out of register in the gas valve casing, thus preventing the free flow of gas save through the pilot hole Z As soon as the level of water is restored so that same flows into the float casing 7c normal conditions are again restored. I

Should the level of the water in the float or puff pipe f, then the second float 7o rises and acts on the circular plate 70 and lever Z" thus moving the full aperture Z out of register and only allowing gas to pass through the slot Z Thus, as the second float Z3 rises, the gas is throttled more and more passed to keep the water at boiling point so long as the second float remains elevated. \Vhen water is drawn off, the second float Zr" falls and allows the free flow of'gas.

A small pilot burner m may be provided. as shown in F l and 3, which will keep the water at boiling point when the large burner is turned off.

By using such a small pilot burner, the boiling water chamber 9 can be emptied of water whereas if only the large burner was used the chamber would be continually filled with boiling water which may not be required. V

The draw-off tap marked 9 is clearly until only a suflicient quantity isshown in Figs. 1 and 3, and same is carried on a short length of screwed tube 9 which screws into a nut g soldered onto the easing 0. The screwed tube g carries two lock nuts gt lVhen the draw-off tap g is screwed into place, the washer g is tightened between the lock nuts and a collar soldered or fixed on the casing b. The vertical position of the draw-off tap g can be secured by adjustment of the lock nuts g.

I prefer to use a canopy a fitted to the top of the heater and I may have a flue pipe connected thereto.

By unscrewing the draw-off tap g, and its supporting tube 9 and by removing the screws Z and disconnecting the lever it etc, the casing 0 can be lifted away and the interior of casing b and the exterior of casing c cleaned of deposit. The bottom of the casing 7) can be easily renewed.

The feed water connections to the water valve box it is made at h as indicated in Fi s. 1, 2 and 4c.

uitable passage ways or holes such as those marked (Z exist in the float chamber by which communication is rendered possible between 0 and the interior of the float chamber (Z and between d and pipe 0' (see Fig. 2). These passageways, however, do not communicate with the chamber 9, the puff pipe being the only communication between e, (Z, and c, as the boiling chamber, and g as the collecting chamber. It will thus be seen that as 0*, (Z, and e are closed at the top, steam pressure forces out water from to g, the float (Z falls and admits further feed water.

The rod (Z is preferably a tube open at the top to allow escape of any air pressure from the interior of the float (5" via the aperture a.

I declare that what I claim is.

1. In a water heater, a heating device, a chamber wherein the water, is boiled, and a second independent chamber wherein the boiled water is collected, the boiling water being forced by steam pressure from the boiling chamber to the second independent collecting chamber, and automatic means for feeding water to the boiling chamber.

2. A water heater comprising a heating device, a chamber wherein the water is boiled, a second independent chamber wherein the boiled water is collected from the boiling chamber, a concentric supply chamber and automatic means supplying water to said concentric supply chamber comprising a valve box, a valve therein, and lever and float devices by which the water supply is controlled.

3. A water heater comprising an inside central pan and an outer pan, the outer boiling pan supplying the water when boiled to the inner pan, and a feed water supply external to said two pans and automatic means for feeding water from the external supply to the outer or boiling pan.

4. A water heater consisting of two central pans, a heating device, which heats the outer boiling pan and supplies the water when boiled to the inner pan and an exterior hollow shell lying about the said two pans and from which water is delivered to the boiling pan and automatic means to supply cold water to the exterior hollow shell.

5. A water heater consisting of two central pans, an outer boiling pan, a heating device to heat such boiling pan, an inner pan, said outer pan supplying the water when boiled to said inner pan, an exterior shell adapted to receive feed water and to deliver same to the said boiling pan and an automatic feed water control delivering to the exterior shell and comprising a valve device, lever connections and float controlled by water acting on said float as set forth.

6. A water heater having two central chambers, an outer boiling chamber, and an independent collecting chamber, the boiled water being delivered from the outer to the collecting chamber automatic water supply means for controlling the water supply, and

automatic means for throttling the fuel supply when the collecting chamber is nearly full of water, said automatic throttling means comprising a disc valve, lever connections, and a float combination as set forth.

7. A water heater having two central pans the outer being a boiling pan and the inner a collecting pan, an exterior water jacket device, an automatic water supply combination feeding the exterior water jacket device, a gas heating appliance in connection with the boiling pan, and automatic means which regulate the supply of gas to said gas heating appliance.

8. In combination in a water heater two concentric pans, comprising an outer boiling pan, and an inner pan for receiving the water when boiled, an exterior water containing shell feeding the boiling pan, automatic water controlling means comprising a valve device, levers, and float, and a gas heating.

device to heat the boiling pan and consisting of a control valve, levers and floats as set forth.

9. A water heater consisting of a boiling pan, a pan to receive the water when boiled, an exterior water shell, said pans and shell being concentric, automatic means governing the water supply to the exterior shell comprising a valve, lever, float, and a gas burning device heating the boiling pan and supplied with gas and automatic controlling means governing the gas supply comprising a valve, levers, and floats as herein set forth.

In testimony whereof I have signed my name to this specification.

HAROLD I-IARGREAVES. 

